ActiveX - Checkbox

The ActiveX Checkbox can be placed directly onto a worksheet.
Display the "Developer" tab, Controls group and select from the Insert drop-down.

Draw the control onto the worksheet.

When an ActiveX control is added to a worksheet it is actually embedded and becomes an Object of the worksheet.

Shortcut Menu

When you right mouse click on this control the following shortcut menu will be displayed.

Linking to a Cell

To link the status of the checkbox with the value in a cell you need to add some VBA code.
Double click on the control.
This will open the Visual Basic Editor and insert the corresponding checkbox "Click" event.
This event will be added to the code module of the active worksheet.

There is also a "LinkedCell" property that can be used.
You can use this property if you do not want to double click and add the VBA code.
The LinkedCell approach gives you less flexibility and always puts TRUE or FALSE in the cell.

Changing the Font and Size of the Text

This only changes the font size of the text, not the size of the square box.
Right mouse click and select "Properties" to display the Properties popup window.
Find the Font property and click on the button on the right hand side to change the font.

Changing the size of the Square Box

There is an option called "move and size with cells" on the Format Control dialog box but this cannot be used to change the size of the square box.

An alternative to this is to display a tick symbol inside the actual cells, combined with some VBA code.
In this example we are adding 10 check boxes to the cell range "B2:B10".
This approach adds "1" or "0" to the adjacent cells in column "C".

Add the following code to the code module of the worksheet.
Change the value of "sCheckBoxesRanges" to be the cell range you want to add check boxes to.
Run the "AddCheckboxes" subroutine once to initialise the cells.

Const sCheckBoxesRange As String = "B2:B10" 

Private Sub AddCheckboxes() 
    With Range(sCheckBoxesRange) 
        .Value = Chr(163) 
        .Font.Name = "Wingdings 2" 
        .Font.Size = 25 
        .Offset(0, 1).Value = 0 
    End With 
End Sub 

Private Sub Worksheet_SelectionChange(ByVal Target As Range) 
    If (Target.Cells.Count = 1) Then 
        If Not Intersect(Range(sCheckBoxesRange), Target) Is Nothing Then 
            If Target.Value = Chr(163) Then 
                Target.Value = Chr(82) 
                Cells(Target.Row, Target.Column + 1).Value = 1 
            Else 
                Target.Value = Chr(163) 
                Cells(Target.Row, Target.Column + 1).Value = 0 
            End If 
            Cells(Target.Row, Target.Column + 1).Select 
        End If 
    End If 
End Sub